专利名称：POLYURETHANES
发明人：COURY, Arthur,BEZUIDENHOUT, Deon,DE VILLIERS, Jandré,COETZEE,, Johan,CONRADIE,
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asiq>英语口语练习资料申请号：IB2015/059787北京国际学校
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madam申请日：20151218
托福培训上海
公开号：WO2016/098073A2
公开日：
20160623
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专利内容由知识产权出版社提供
摘要：Partially crosslinked polyurethane polymers comprising diisocyanates and aliphatic hydrocarbon soft gments with a short-chain diol chain extender and a multifunctional amine and/or alcohol crosslinker to provide a polyurethane polymer with uful properties for the production of medical implant devices such as heart valves, are described. The polymers have an unexpected linear elastic region in a range from 5 -100% and preferably between 10 - 35%. In some embodiments the polyurethanes are a thermally convertible gel formulation which may be converted to a liquid formulation by extended heating to render the polymer suitable for solvent processing techniques such as casting, spraying, spinning, etc. The invention also provides for living hinge polyurethane polymers which are thermally modifiable from a gel to a liquid and reaction injection moulded (RIM) polyurethanes with an enhanced flex life.
申请人：STRAIT ACCESS TECHNOLOGIES HOLDINGS (PTY) LTD
地址：7925 ZA
国际民航组织
mermaid国籍：ZA
代理人：VON SEIDELS INTELLECTUAL PROPERTY ATTORNEYS et al.更多信息请下载全文后查看
